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Friday, May 31 • 12:00pm - 12:50pm
XFS in Rapid Development - Jeff Liu, Oracle

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XFS is in rapid development in the past three years, I'd like to give an update with new features, significant improvements after upstream 3.0, as well as the coming things.


  • Improve metadata performance and scalability with delaylog enabled by default.
  • Online discard(aka TRIM) for solid-state drives (SSDs) and thinly-provisioned storage.
  • SEEK_DATA/SEEK_HOLE as well as the refinement.
  • Better disk quota caching, speedup in-memory quota searching as well as scalability.
  • Kill xfsbufd daemon in favour of on-stack delayed buffer writeback lists
  • Reduce exclusive ilock hold times.
  • Refactored inode allocator.
  • New xfsalloc workqueue, resolve kernel 4k stack exceeding.

Highlights(User space):

  • Various improvements.


  • Support project and group quota at the same time.
  • Online shrinking.
  • CRC check.
  • xfs_reno(8).

Junier kernel developer, experienced system admin.

avatar for Jeff Liu

Jeff Liu

Senior Member Of Technical Staff, Oracle
Jeff has been working for Oracle mainline kernel engineering team since 2011. He is currently focus on XFS, LXC as well as OCFS2 development. Jeff started his open source career with developing Wireshark dissector for the OCFS2 network protocol and improving Coreutils for copying... Read More →

Friday May 31, 2013 12:00pm - 12:50pm JST

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